Massive difference in charge/discharge amps on 2 lith banks?

[timselectric]

You can't keep two mismatched batteries any more balanced, than you can keep any 4 mismatched cells balanced it's that simple. If he was to combine the two banks into one 8s2p bank paring a 280ah cell with a 300ah cell in parallel (2p) then connect the 8 (2p) banks in series (8s) then he would have one balanced bank.

 

[Nobodybusiness]

The 300 amp cells are grade a & balance perfectly however the 280's I got from a crap seller & got 5 balance boards on it to keep it in line. Still the difference is remarkable.

Did I read that right?

5 balancer boards on one battery?

 

[timselectric]

Depending on the amperage of the active balancers, this could account for the difference.

 

[rmaddy]

You can't keep two mismatched batteries any more balanced, than you can keep any 4 mismatched cells balanced it's that simple. If he was to combine the two banks into one 8s2p bank paring a 280ah cell with a 300ah cell in parallel (2p) then connect the 8 (2p) banks in series (8s) then he would have one balanced bank.

See Will's video: